Still haven't seen the match yet, but I'm headed home now.
I guess it kinda goes back to what Bim was saying about Nadal on grass. We've kind of lost sight of the fact that his phenomenal comeback results have take place entirely on clay and Indian Wells, which has some of the slowest hardcourts around. Nadal is a frighteningly bad 2-3 the past two years on grass. The temptation is to say that Nadal just ran into someone with a hot hand two years in a row. These lowly players can be hot for minute but then the Champion makes an adjustment or two, digs in, and wins.
I'm not prepared to say Nadal is injured or limited, but there's been this notion that he can play as much as he likes on clay and it doesn't hurt his knees. It's true that clay is an easier surface on your joints than asphault, but Nadal plays more matches than anyone during the clay season, and a million long rallies.
The thing that I'll be watching for is Nadal, in his efforts to fend off Djokovic to remain the dominant force in clay court tennis, hasn't fallen back into some clay court specialist mentalities, habits that he's having a difficult time breaking in the turnaround on grass. He's still playing like he has time to make up space and run around his backhand consistently, and the grass takes that time away. The points are dynamic and short, and Nadal doesn't seem fit for that type of game playing well beyond the baseline. He's got spacing issues.
Also, what happened to his big first serve? He was consistently serving in the 120s and over 130 against Rosol last year, today he was serving in the 110 range.